Rename function not working

[eluser]bretticus[/eluser]
Off the top of my head, I would echo out the result of realpath("../images/sky2.jpg") and make sure it was a valid path. Otherwise, hard to say. Well, you do need to make the container folder have write permissions too. I suggest NOT using 777. Find out which user the web server runs as (often your user in many hosting solutions) and then make sure that user has write permissions for the container folder (images.)